The sn is located on the bottom of the butt. If it was made after model numbering started, it will also be located under the cylinder yolk on the frame.
Early 80s
there are far to many #s to be a proper serial #
You can get a letter from S&W for 50 USD
Call S&W and they will tell you when it left the factory.
You will have to call S&W to find out.
Call S&W and they will tell you when it left the factory.
No such weapon made by S&W
Call S&W and they will tell you when it left the factory.
You will have to call S&W
Rossi M88: That may depend on when it was made. What is the serial number? That may help.
You will have to get it lettered by S&W to find out.
Acquire a copy of the Standard Catalog of Smith and Wesson by Supica and Nahas.